Hire a Freelance User Testing Developer

Jonathan Kanaan

You need someone that knows the ins and outs of technology and UX. I'm an experienced software engineer and user experience designer that has worked for JPMorgan Chase, the United Nations, American Express, AT&T, and Lockheed Martin as well as for several startups and small businesses.

Herbert Elwood Gilliland III

I have spent more than 5000 days of my life pursuing the zen of creative software development. I pride myself on continuing the values that I learned in the early days of the software industry, the 1990s. My career has spanned decades in many different industries, but I have worked almost exclusively in software and my fallback, professional cooking. When I'm not working, I spend my time hiking, gardening, crafting and making retro video games under the name Lost Astronaut Studios.

Manuele Capacci

I'm an experienced designer working for more than fifteen years in the field of interaction and digital product design. I help developers, product owners and entrepreneurs leverage design as a deep competitive advantage nowadays, and as a tool to make your idea come alive or your project take the leap to the next level. I can support you with mentoring and design critique sessions. You will find out how some right small changes can make such a profound difference in the final perceived quality of your project outcome. https://mnlcpc.com

Emmanuel Chilaka

I'm a Frontend Engineer passionate about crafting clean, efficient, user-friendly web applications. With several years of experience specializing in React, JavaScript, and modern web development practices, I’m here to help you tackle your coding challenges and grow your skills confidently. My expertise lies in building scalable, responsive interfaces, debugging tricky issues, and optimizing user experiences in the fintech space. I’m also well-versed in JavaScript, unit testing, and project workflows, so whether you’re struggling with debugging, implementing best practices, or understanding complex frontend concepts, I’m here to guide you. I believe in fostering a supportive and collaborative learning environment where we solve immediate problems and focus on long-term growth. I enjoy breaking down complex concepts into simple, actionable steps and helping you build a strong foundation for becoming an independent problem solver. My goal as a mentor is to share what I’ve learned, help you avoid common pitfalls, and inspire confidence in your coding journey. Let’s work together to level up your skills and build something amazing!

Yonas Woldemariam

• More than 19 years of overall software development experience having expertise in all stages of the whole software development life cycle. • Microsoft Certified Solution Developer in .Net • Proficient in Object Oriented Analysis and Design(OOAD), Object Oriented Programming (OOP), ,design patterns, software development best practices, Agile development Methodology, and TDD • Excellent interpersonal, communication and organizational skills, productive relationships by working effectively with team members at all levels; easily adapt to new environments and with great potential to learn. • Have a great passion about technology and always try to keep up by reading tech blogs, checking out developer podcasts and webcasts, and attending developer training classes

Mohab

I'm **Mohab** UX Design Lead based in Germany, bringing over 16 years of experience and a robust software engineering background to the table.

Johnny B. (Ionică Bizău)

Freelance User Testing Developer5.0 (1736 reviews)

Hey! I am Johnny B. 🙏 (Actually, my Romanian friends call me Ionică, which in English is basically: Johnny). ...and I 💖 emojis! I started coding around 2010, starting with simple static websites, WordPress applications, and then tried Node.js for the first name around 2012. Since then, I have been working with Node.js. I like it a lot. Currently, I do the best in: ★ Node.js 🚀 ​ ​ ☆ Command line tools ​ ​ ☆ Express.js ​ ​ ☆ Passport ​ ​ ☆ Raw/minimal code, without frameworks (e.g. simple HTTP server) ​ ​ ☆ Using npm ​ ​ ☆ Creating npm packages for Node.js (and for the front-end as well) ​ ​ ☆ Scraping the web ​ ​ ☆ Automation of repetitive tasks ​ ​ ☆ Image processing ★ JavaScript ✨ ​ ​ ☆ Creating and importing libraries ​ ​ ☆ jQuery (creating plugins, using them etc) ​ ​ ☆ Scraping ​ ​ ☆ Automation of repetitive tasks ​ ​ ☆ Publishing npm packages ​ ​ ☆ SVG (SVG.js, d3.js) ★ HTML & CSS 🎨 ​ ​ ☆ Fixing CSS quick issues ​ ​ ☆ Implementing mockups ​ ​ ☆ Making the page responsive ​ ​ ☆ SEO tips & tricks ★ Command line 💻 ​ ​ ☆ Shortcut tips ​ ​ ☆ Creating command line tools ​ ​ ☆ Using VIM & Tmux ★ Code Review 👀 ​ ​ ☆ I do code review offline, for Node.js, JavaScript, eventually CSS. ​ ​ ☆ Can be done in a live session as well. ​ ​ ☆ Security checks ​ ​ ☆ I point things that can be done in a better way ★ Using Git & GitHub/GitLab/BitBucket etc. 😸 ​ ​ ☆ Introduction to how Git works ​ ​ ☆ Using Git hosting services (e.g. GitHub, GitLab, BitBucket etc) ​ ​ ☆ Top Git commands ​ ​ ☆ Shortcuts If I can help, I will definitely do it, as long your app is not promoting things that tend to be potentially immoral. For example, I'm happy to help you build an e-shop, but I will probably not build an e-shop designed specifically for selling wine since I am against the use of alcohol for drinking. ♦ 🚀 Node.js: 9 years of experience, ~700 packages published on NPM ♦ 💛 JavaScript: 9 years of experience, lots of libraries you can download freely (https://goo.gl/ewoQsK) ♦ 🗣 Fluent in speaking English & Romanian, and comfortable in Spanish & Portuguese ♦ 😸 GitHub Enthusiast (follow me: https://github.com/IonicaBizau) ♦ 😻 Git & GitHub power user ♦ 🍀 Comfortable with MongoDB (especially, the native driver for Node.js) ♦ ❇️ I will not charge you if I can't fix your issue. Why you can trust me: ★ I am a vegetarian. I have never eaten meat. 🍍🥑🥗 ★ I have never drunk wine, beer, etc. Water is the best. 💧 ★ I work for 6 days, and I rest on the 7th day. That's why I am *not* available on Saturdays (specifically between Friday's sunset and Saturday's sunset, my location at the time—you can my timezone a little bit below). 🙏 ★ I sleep between 9:18 PM and 4:42 AM. Depending on your timezone I can wake up earlier if you book a session with me. 💤 ★ I am a musician (pianist and organist). 🎹 ★ I use VIM on macOS and Linux. 🐧🍏

Alexandru Hodis

Hi, I'm Alexandru Hodis. I am working as backend developer since 2016 with Spring, Java and from time to time I am working on frontend in Angular. On the backend part, I can help you write Components, Services, Controllers and Configurations for your Spring Application. On the frontend part, I can help you write Web Components, Services, Html and CSS. ►Java: 6 years of experience » general OOP, lambdas ►Spring: 6 years of experience » creating services, designing databases, applying configurations ►Angular: 6 years of experience » creating webcomponents, html design, css I mainly work on Linux (debian) and my preferred IDEs are: JetBrains IntelliJ Idea and WebStorm. In my free time I go to the gym, make games with Unity3D.

Bryce Howitson

Google Developer Expert (Web Tech + Product Strategy + UI/UX) - Certified Design Sprint Master I'm a Product & UX designer with heavy front-end dev experience. I enjoy helping to solve the "visual" challenges created by designers who don't code as well as working with designers to help them discover other techniques to accomplish their goals. In the past, I've taught classroom courses covering web technology, web development, marketing, and design theory. I want others to succeed and I'll work to make sure you understand the why, not just the how. My specialty is product strategy. I'd love to help you define solutions, understand users, make business decisions, test assumptions and make better products!

Byron Sommardahl

Byron has been developing software since he was 9 years old, coding RPG's on his Commodore 64 and his best friend's Apple IIe. When he was just 14, he developed a driver dispatch program for a large home repair company, a pawn shop management program, and a POS for clothing stores (that one is still in production). Since then, software development has been a constant and consuming passion for Byron. In 2010, Byron and some friends founded a software development company, Acklen Avenue, that has now grown to more than 50 distributed employees and runs multiple simultaneous agile software development projects daily. Byron is a true believer in anything that improves software maintainability, usability, and delivery.